if a gas shows negative deviation at STP , then
Answers
Answer:
When Z < 1, it is a negative deviation. It shows that the gas is more compressible than expected from ideal behaviour. When Z > 1, it is a positive deviation. It shows that the gas is less compressible than expected from ideal behaviour.
Answer:
Causes of Deviation from Ideal Behaviour
The causes of deviations from ideal behaviour may be due to the following two assumptions of kinetic theory of gases.
The volume occupied by gas molecules is negligibly small as compared to the volume occupied by the gas.
The forces of attraction between gas molecules are negligible.
The first assumption is valid only at low pressures and high temperature, when the volume occupied by the gas molecules is negligible as compared to the total volume of the gas. But at low temperature or at high pressure, the molecules being in compressible the volumes of molecules are no more negligible as compared to the total volume of the gas.